- EMDB-45832: CryoEM Structure of the C-terminally truncated form of human NAD ... -
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基本情報
登録情報
データベース: EMDB / ID: EMD-45832
タイトル
CryoEM Structure of the C-terminally truncated form of human NAD Kinase
マップデータ
試料
複合体: human NAD Kinase
タンパク質・ペプチド: NAD kinase
キーワード
catalyzes the reaction of ATP + NAD+ = ADP + H+ + NADP+ / SIGNALING PROTEIN
機能・相同性
機能・相同性情報
NAD+ kinase / NAD+ kinase activity / NADP+ biosynthetic process / Nicotinate metabolism / NAD+ metabolic process / phosphorylation / positive regulation of insulin secretion involved in cellular response to glucose stimulus / ATP metabolic process / ATP binding / metal ion binding / cytosol 類似検索 - 分子機能
National Institutes of Health/National Cancer Institute (NIH/NCI)
R01GM143236
米国
Welch Foundation
I-2067-20210327
米国
Welch Foundation
I-2067-20240404
米国
Agence Nationale de la Recherche (ANR)
ANR-20-CE18-0025
フランス
Fondation pour la Recherche Medicale (FRM)
EQU202303016265
フランス
引用
ジャーナル: Sci Adv / 年: 2025 タイトル: Cryo-EM structure and regulation of human NAD kinase. 著者: Prakash P Praharaj / Yang Li / Charline Mary / Mona H Soflaee / Kevin Ryu / Dohun Kim / Diem H Tran / Trishna Dey / Harrison J Tom / Halie Rion / Muriel Gelin / Andrew Lemoff / Lauren G ...著者: Prakash P Praharaj / Yang Li / Charline Mary / Mona H Soflaee / Kevin Ryu / Dohun Kim / Diem H Tran / Trishna Dey / Harrison J Tom / Halie Rion / Muriel Gelin / Andrew Lemoff / Lauren G Zacharias / João S Patricio / Thomas P Mathews / Zhe Chen / Corinne Lionne / Gerta Hoxhaj / Gilles Labesse / 要旨: Reduced nicotinamide adenine dinucleotide phosphate (NADPH) is a crucial reducing cofactor for reductive biosynthesis and protection from oxidative stress. To fulfill their heightened anabolic and ...Reduced nicotinamide adenine dinucleotide phosphate (NADPH) is a crucial reducing cofactor for reductive biosynthesis and protection from oxidative stress. To fulfill their heightened anabolic and reductive power demands, cancer cells must boost their NADPH production. Progrowth and mitogenic protein kinases promote the activity of cytosolic NAD kinase (NADK), which produces NADP, a limiting NADPH precursor. However, the molecular architecture and mechanistic regulation of human NADK remain undescribed. Here, we report the cryo-electron microscopy structure of human NADK, both in its apo-form and in complex with its substrate NAD (nicotinamide adenine dinucleotide), revealing a tetrameric organization with distinct structural features. We discover that the amino (N)- and carboxyl (C)-terminal tails of NADK have opposing effects on its enzymatic activity and cellular NADP(H) levels. Specifically, the C-terminal region is critical for NADK activity, whereas the N-terminal region exhibits an inhibitory role. This study highlights molecular insights into the regulation of a vital enzyme governing NADP(H) production.